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VPN Client error 51

My VPN Client has worked for several years and recently, I started to get

"Error 51: Unable to communicate with VPN subsystem.

Please make sure that you have at least one network interface that is currently active

and has an IP address and start this application again."

I am using Windows 7 Pro, SP1. 32 bit OS.

Cisco System VPN Client version 5.0.02.0090

I have another coworker with the same configuration, and his client still works.

It seems that this error is pretty common, I have found it in other forums, and I have tried some of the recommendations; but the problem still persists.

I have already uninstall and reinstall the program. I have also uninstall TightVNC that I had to use for another project.

Any help will be appreciated.

Luis

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